
public class CalculatorTest {
	public static void main(String[] args){
		CalculatorInterface calc= new Calculator();
		int x=8;
		int y=4;
		System.out.println(x+"+"+y+"="+calc.add(x, y));
		System.out.println(x+"*"+y+"="+calc.multiply(x, y));
		System.out.println(x+"-"+y+"="+calc.substract(x, y));
		System.out.println(x+"/"+y+"="+calc.divide(x, y));

	}
}
